JPH06134913A - Laminated molded product and production thereof - Google Patents

Abstract

PURPOSE:To provide a composite molded product constituted by strongly bonding a fiber reinforced thermoplastic resin laminate and a foamed resin object under low pressure. CONSTITUTION:A laminated molded product is constituted by bonding a foamed resin object and laminates 1, 2 by a layer formed by the mutual melting, mixing and solidification of the thermoplastic resin of the laminates themselves and the resin of the foamed resin object itself at a bonding part. This laminated molded product is produced by respectively heating the laminates 1, 2 each formed by laminating fiber reinforced thermoplastic resin sheets containing 30-85vol.% of a reinforcing fiber in a laminar state to melt the thermoplastic resin thereof and superposing them on the foamed resin object 3 having a desired outer shape to closely bond them to the foamed resin object 3 and mutually welding the laminates and the foamed resin object.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated molded article obtained by joining a fiber reinforced thermoplastic resin laminate to the surface of a foamed resin body and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, as a method for producing a fiber-reinforced thermoplastic resin molded article, a method described in JP-A-1-286823 entitled "Continuous shaping method of fiber-reinforced resin molded article and its apparatus" is disclosed. In addition, there is generally known a method in which a fiber-reinforced resin plate is heated and softened and then pressure-molded at a high pressure in a mold by a pressing machine.

Generally, when manufacturing a product composed of a resin laminate containing reinforcing fibers and a foamed resin body, some kind of adhesive is used between the laminate formed by the above method and the foam, or a machine is used. It was necessary to involve a joining member to be joined mechanically or to use a reactive thermosetting resin. In particular, the polypropylene resin is generally welded by a method such as a heat plate without an appropriate bonding agent.

[0004]

However, in the above method, steps such as applying an adhesive, crimping, curing etc. are required after the laminated body is shaped into the shape of the foamed resin body to be joined. In addition, when mechanically joining members such as bolts and nuts are used, complicated processes such as pre-processing and mounting and assembling processes for mounting the members are required. Furthermore, when the joined molded product is used as a structural strength member,
In mechanical joining of bolts and nuts, stress concentration is applied to the joining part, so it is necessary to strengthen the molded product,
Further, in the case of joining by a chemical method such as an adhesive, there arises a problem such as interfacial peeling of the joining surface.

In particular, in recent years, in the production of an integrated product of a fiber-reinforced thermoplastic resin laminate using a polypropylene resin and a polypropylene foam, the surface of the laminate already formed by heating from the outside with a hot plate to integrate them. However, there is a problem that the foamed resin body will be crushed if it is pressed for integration.

Therefore, an object of the present invention is to firmly bond a fiber-reinforced thermoplastic resin laminate and a foamed resin body under a low pressure without using mechanical coupling members such as bolts and nuts or adhesives. Another object of the present invention is to provide a composite molded article and its manufacturing method.

[0007]

Means for Solving the Problems The inventors of the present invention have made extensive studies in order to achieve the above object, and as a result, completed the present invention. That is, the laminated molded article according to the present invention is a laminated molded article obtained by joining a laminated body of one or more layers formed by laminating fiber-reinforced thermoplastic resin plates in layers to the surface of a foamed resin body having a desired outer shape, The foamed resin body and the laminated body were joined together by a layer formed by melting, mixing, and solidifying the thermoplastic resin of the laminated body itself and the resin of the foaming resin body themselves at the joint portion without using an adhesive. Characterize.

It is recommended that the fiber-reinforced thermoplastic resin plate contains 30% or more and 85% or less by volume content of reinforcing fibers, and the reinforcing fibers are glass fibers, and the thermoplastic resin is a polypropylene resin. The present invention can be suitably applied to a laminated molded article in which the foamed resin body is a polypropylene foam.

The manufacturing method according to the present invention for manufacturing the above-mentioned laminated molded article is 30% or more and 85% in volume content.
Of laminated fiber reinforced thermoplastic resin plates containing less than or equal to 10% of reinforcing fibers in layers are heated to make the thermoplastic resin in a molten state and deaerate the air contained in the layers. And one or more laminated bodies in which the thermoplastic resin is in a molten state are superposed on and closely adhered to the surface of the foamed resin body having a desired outer shape, and the heat of the laminated body melts the surface of the foamed resin body. It is characterized in that the step of welding the laminated body and the foamed resin body to each other and the step of cooling and solidifying the laminated body and the foamed resin body which are welded to each other to integrate them are sequentially performed.

The above manufacturing method is particularly suitable when the reinforcing fibers of the fiber-reinforced thermoplastic resin plate are glass fibers, the thermoplastic resin is a polypropylene resin, and the foam resin body is a polypropylene foam body. Applicable.

Further, another laminated molded article according to the present invention is one in which a laminated body composed of laminated fiber-reinforced thermoplastic resin plates is joined to the surface of a foamed resin body having a desired outer shape. , A laminated molded article formed by joining a decorative material to the surface of the laminated body opposite to the surface bonded to the foamed resin body, wherein the foamed resin body and the laminated body are laminated without using an adhesive. The thermoplastic resin of the body itself and the resin of the foamed resin itself are joined together by a layer formed by melting, mixing, and solidifying at the joint portion, and the laminate and the decorating material do not use an adhesive agent Is a thermoplastic resin product, the thermoplastic resin of the laminate itself and the resin of the decorating material itself are joined together by a layer formed by melting, mixing, and solidifying at the joining portion, and Is an organic or inorganic fiber product In that case, the thermoplastic resin is embedded in the molten thermoplastic resin of the laminate, or the thermoplastic resin of the laminate is impregnated between the fibers of the decorative material. It is characterized by being joined by a layer formed by solidification.

It is recommended that the fiber-reinforced thermoplastic resin plate contains reinforcing fibers in a volume content of 30% or more and 85% or less, and the reinforcing fibers are glass fibers, and the thermoplastic resin is a polypropylene resin. The present invention can be suitably applied to a laminated molded article in which the foamed resin body is a polypropylene foam.

The manufacturing method according to the present invention for manufacturing the above-mentioned laminated molded article has a volume content of 30% or more and 85% or more.
Of laminated fiber reinforced thermoplastic resin plates containing less than or equal to 10% of reinforcing fibers in layers are heated to make the thermoplastic resin in a molten state and deaerate the air contained in the layers. And one or more laminated bodies in which the thermoplastic resin is in a molten state are superposed on and closely adhered to the surface of the foamed resin body having a desired outer shape, and the heat of the laminated body melts the surface of the foamed resin body. , The laminated body and the foamed resin body are welded to each other, and at the same time, a decorative material is overlaid and closely adhered to the surface of the laminated body opposite to the surface to be closely adhered to the foamed resin body, and the laminated body and the decorated material are adhered. And a step of joining the laminated body, the foamed resin body, and the decorating material, which are welded or joined to each other, to solidify them by cooling and solidifying them.

In the above-mentioned manufacturing method, when the decorating material is a thermoplastic resin product, the surface of the decorating material is melted by the heat held by the laminate so that the laminating body and the decorating material are separated from each other. Characterized by bonding, and when the decorating material is an organic or inorganic fiber product, the fibers of the decorating material are embedded in the molten thermoplastic resin of the laminate, or It is characterized in that the laminate and the decorating material are bonded to each other in a state where the molten thermoplastic resin of the laminate is impregnated between the fibers.

Further, the above-mentioned manufacturing method is particularly preferable when the reinforcing fibers of the fiber-reinforced thermoplastic resin plate are glass fibers, the thermoplastic resin is a polypropylene resin, and the foamed resin body is a polypropylene foam. It can be applied suitably.

[0016]

The present invention will be described in detail below. As the molding material used in the present invention, a unidirectional fiber-reinforced thermoplastic resin plate (hereinafter referred to as a UD prepreg) in which a fiber sheet obtained by aligning continuous fibers in one direction is used as an aggregate and impregnated with a thermoplastic resin is used. .) Or plain weave, satin weave, twill weave, etc. impregnated with the above resin, a multidirectional fiber reinforced thermoplastic resin plate (hereinafter,
Woven prepreg) is used. These prepregs are laminated alone or in combination so as to have a desired fiber orientation and thickness, and these laminated bodies are preheated and compressed prior to the molding step, so that air existing between the prepregs can be degassed. It is possible to improve the physical properties of the obtained molded product.

Fibers that serve as the above-mentioned aggregate include glass fibers, carbon fibers, and aramid fibers (registered trademark "Kepler").
Etc.) and other synthetic resin fibers, silicon carbide fibers and other inorganic fibers,
Examples of the metal fiber include titanium fiber, boron fiber, and stainless steel, but are not necessarily limited thereto.

On the other hand, examples of the thermoplastic resin impregnated between the aggregate fibers include polystyrene, polyvinyl chloride, high density polyethylene, polypropylene, polycarbonate, polybutylene terephthalate, polyethylene terephthalate, polyether sulfone, polysulfone and polyether. Examples thereof include, but are not necessarily limited to, imide (trademark “ULTEM”), polyether ether ketone, polyphenylene sulfide, and the like.

Examples of the foamed resin body include polypropylene foam, polyurethane foam, and polystyrene foam having polypropylene foam as an outer layer.
It is not necessarily limited to these.

Examples of the decorating material include sheets or foams of polypropylene, PS, etc., thermoplastic resin products such as PVC, PZT sheets, etc., as well as cloth, non-woven fabrics, asbestos, etc., on the surface of which fibers are exposed. However, it is not necessarily limited to these.

In the production of the composite molded article in the production method according to the present invention, first, a step of heating the laminated body is provided. The purpose is to perform deaeration between the prepregs and to facilitate processing in the next step. This is to give sufficient heat to the laminate.

Generally, when a thermoplastic resin plate containing no reinforcing fiber is in a heat-melted state, its flatness cannot be maintained, and much more difficult to shape. Therefore, in such a case, the shaping is performed within a closed mold, or the shaping is performed within a softening point range below the melting point of the thermoplastic resin. However, the fiber-reinforced thermoplastic resin laminate of the present invention, the resin is impregnated or bonded in the three-dimensional structure of the fibers composed of layered prepregs, the thermoplastic resin is heated and melted, the resin Even if it is in a fluid state alone, it does not flow and can retain the shape of the laminate. Therefore, in the next step, an external force is applied to this laminated body in accordance with the shape of the outer surface of the foamed resin body of the other party to be joined, and the laminated body can be shaped and brought into close contact with the foamed resin body.

In the production method of the present invention, even after the thermoplastic resin laminate is shaped so as to be in close contact with the surface of the foamed resin body,
Since the thermoplastic resin maintains the molten state, the surface layer of the foamed resin body is melted by the heat supplied from the laminated body, and the laminated body and the foamed resin body are welded to each other. For example, the joint surface is integrated. At this time, if the edge portions of the plurality of laminated bodies enclosing the foamed resin body are brought into close contact with each other, the thermoplastic resins on the joint surface are welded to each other. Therefore, if this is solidified by cooling, the laminated body The joint surfaces of the edges are completely integrated, and it is possible to form a joint surface having the same quality and high strength as the portion of the laminate other than the joint surface.

Further, when the laminated body and the foamed resin body are joined together, at the same time as this, the decorative material is brought into close contact with the surface of the laminated body on the opposite side not in contact with the foamed body. It receives heat from the laminate and its joint surface is melted and fused. Further, even when the decorative material is one that does not melt,
If this is a textile product, the string-like fibers extending from the decorating material will be embedded in the molten resin layer of the laminate, or in the fibers or texture. Since the resin is impregnated with the molten resin, the laminate and the decorating material can be integrated by cooling and solidifying the resin.

When the volume content of the fibers in the prepreg laminate is less than 30%, the resin is remarkably flowed, and proper shaping cannot be performed by the production method of the present invention. However, if the volume content of the fibers exceeds 85%, the resin content becomes small, and a desired molded product cannot be obtained. Therefore, the fiber-reinforced thermoplastic resin plate constituting the laminate used in the present invention preferably contains reinforcing fibers in a volume content of 30% or more and 85% or less, and more preferably a fiber volume content of 40% or less. -80% has suitable molding processability, and a desired molded product can be obtained.

The foamed resin body generally deforms under high pressure. Further, when the heated fiber-reinforced thermoplastic resin laminate is compressed for shaping, the molten resin flows out from the entanglement of the fibers, except when pressure is applied in a mold in close contact with the laminate. Therefore, generally, the molding pressure is arbitrarily selected under the processing conditions in terms of the relationship between the resin temperature and the viscosity and the compressive strength of the foamed resin body, but in the production method of the present invention, the molding pressure of the fiber-reinforced thermoplastic resin laminate is 3 kg. /
cm ² or less (usually conventional method 4 kg / cm ² or more), preferably
About 0.1 to 1.5 kg / cm ² is desirable.

The combination of the thermoplastic resin constituting the fiber reinforced thermoplastic resin laminate and the resin type of the foamed resin body is such that the temperature applied to the laminate, that is, the temperature above the melting point of the thermoplastic resin and below the decomposition temperature. The foamed resin body is selected so that it is above the melting point of the foamed resin body and below the decomposition temperature.

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is an external perspective view of a laminated composite molded article according to the present invention obtained by a manufacturing method according to the present invention.
FIG. 2 is a side view showing a state in which a heated laminated body in which a thermoplastic resin is in a molten state is arranged around a foamed resin body in the manufacturing method according to the present invention. FIG. 3 is a side view of a composite molded article obtained by closely shaping the laminated body of FIG. 2 on a foamed resin body and then cooling and solidifying the molded body to integrate the molded body. FIG. 4 is a partially enlarged view of FIG. 3, and is a schematic view showing a state of a joint portion where the laminated body and the foamed resin body are welded and solidified. FIG. 5 is an external perspective view showing another two modes of the laminated composite molded article according to the present invention obtained by the manufacturing method according to the present invention. FIG. 6 is a side view showing an example in which both end regions of two laminated bodies joined around the foamed resin body are joined to each other in the laminated molded article according to the present invention. FIG. 7: is a side view which shows the state which has arrange | positioned the laminated body and the decorating material around the foamed resin body in the manufacturing method which concerns on this invention. FIG. 8 is a side view of a composite molded article obtained by cooling, solidifying, and integrating the foamed resin body, the laminate, and the decorating material of FIG. Figure 9
FIG. 3 is a side view showing an example of a laminated molded product in which a laminate and a decorating material are bonded to both surfaces of a foamed resin body according to the present invention.
FIG. 10 shows the state of the solidified and integrated portion in which the fibers of the decorating material are embedded in the molten resin of the laminate in the example using the decorating material in which the fibers are exposed on the surface. It is an expansion schematic diagram showing.

In the figure, 1 is an upper laminated body, 2 is a lower laminated body, 3 is a foamed resin body, 4 is an upper decoration material, 5 is a lower decoration material, and 6 is a foamed resin body. Layers integrated with laminate, 7
Is a fiber exposed on the surface of the decorative material, and FIG.
Inside, a and b are the joint surfaces of the end regions of the stacked bodies 1 and 2.

As described above, the laminates 1 and 2 arranged on the upper side and the lower side of the foamed resin body 3 as shown in FIG. 2 are present between the prepregs in advance in the heating step before the arrangement. Air to be removed and the laminated bodies 1 and 2
Each of them gives a sufficient amount of heat to melt the surface of the foamed resin body. The heating of the laminate is generally performed at a temperature not lower than the glass transition point of the thermoplastic resin.

Generally, in a resin plate which is not fiber reinforced, when the thermoplastic resin is in a molten state, the laminated body 1 cannot hold the flat plate state as shown in FIG. 2, and as shown in FIG. It is also impossible to add and shape. However, the fibers included in the laminate according to the invention as aggregate have sufficient strength at the temperature at which the thermoplastic resin is in the molten state, and these reinforcing fibers form the laminates 1 and 2 as shown in FIG. It can be held in a flat plate state, and the reinforcing fibers can receive the external force applied to the laminated body to perform shaping. As described above, the thermoplastic resin is impregnated between the fibers or held in the three-dimensional structure of the fibers. When the fiber content is 30% or less, the laminate cannot maintain a constant shape and is not suitable for molding by the method of the present invention.

When the laminated bodies 1 and 2 are brought into close contact with the foamed resin body 3 as shown in FIG. 3, the heat of the laminated bodies 1 and 2 melts the surface of the foamed resin body 3. When the fibers contained in the laminates 1 and 2 are glass fibers, the thermoplastic resin thereof is polypropylene, and the foam resin body 3 is a polypropylene foam resin body, the heat capacity of the glass fibers is larger than that of the polypropylene resin. When the bodies 1 and 2 are heated and a heat quantity is applied to them, heat is retained in the glass fibers to form a kind of heat storage pool. From the glass fibers, the polypropylene resin of the laminated body and the polypropylene resin of the foamed resin body are formed. Since heat is supplied to the polypropylene foam 3, the manufacturing process of the present invention in which the surface layer of the polypropylene foam 3 is melted is performed in a particularly good state, and an excellent composite molded article is obtained.

When the surface of the foamed resin body 3 is melted and welded by the heat held by the laminates 1 and 2, the composite molded article can be obtained in a short time by immediately shifting to the cooling and solidifying step.
Therefore, there is no need for reaction and curing time as in an epoxy thermosetting type, and the processing time is greatly rationalized.

FIG. 4 is an enlarged schematic view showing a state in which the laminated body 1 and the foamed resin body 3 are melted and integrated. When viewed with a microscope, the welding layer 6 is formed on the joint surface between the laminated body 1 and the foamed resin body 3. ing. When the laminated body 1 and the foamed resin body 3 are made of the same resin, a skin layer is formed on the top foamed surface of the foamed resin body 3. In addition, when the laminated body 1 and the foamed resin body 3 are different resins, the welding layer 6 may be mixed with the other resin.

5 (a) and 5 (b) are external perspective views of another composite molded article obtained by the method of the present invention.

FIG. 6 shows a laminated molded article according to the present invention, in which a laminated body 1 and a laminated body 2 bonded to the periphery of a foamed resin body.
FIG. 9 is a side view showing an example in which the respective end portions of (a) and (b) are brought into close contact with each other. The laminated bodies 1 and 2 in which the thermoplastic resin is melted are brought into close contact with the outer peripheral surface of the foamed resin body 3 and at the same time a, b
When both end portions of the laminates 1 and 2 are closely contacted with each other on the surface and cooled and solidified, the composite molded article shown in FIG. 6 is obtained.

7 and 8 are side views of the molding process and the molded product of the composite molded product using the decorating material 4, in which the laminates 1 and 2 are arranged on the upper side and the lower side of the foamed resin body 3, respectively. A decorative material 4 is further arranged on the body 1, and in this state, the foamed resin body 3 and the laminated body 1
When the laminate 1 and the decorating material 4 are brought into close contact with each other and at the same time, the surfaces of the foamed resin body 3 and the decorating material 4 are melted by the heat stored in the laminate 1 and are welded to the laminate 1. The heat accumulated in the laminated body 2 melts the lower surface of the foamed resin body 3 and welds it to the laminated body 2. Therefore, if these are adhered and integrated and then cooled and solidified, the decoration as shown in FIG. It is possible to manufacture a composite molded article having a material.

FIG. 9 is a side view of a composite molded product in which the decorating material 5 is also bonded and integrated on the surface of the lower laminated body 2, and the decorative material 5 is placed on the lower side of the laminated body 2 in FIG. The composite molded article shown in FIG. 9 is obtained by arranging, simultaneously adhering, melting, welding and cooling and solidifying.

FIG. 10 shows the decorative material 4 and the laminated body 1 when the decorative material 4 is made of a material such as a cloth with fibers protruding on the surface or a woven cloth with voids. It is a figure which shows the joined state of. In general, cloth or the like is not melted by heat, and in this case, the fibers 7 protruding from the surface of the decorating material 4 are embedded and embedded in the melted thermoplastic resin layer on the surface of the laminated body 1 and melted. It is possible to form a state in which the laminated body 1 and the decorating material 4 are mechanically and firmly bonded to each other by being partially impregnated into the woven fibers by being partially impregnated with the thermoplastic resin, which is then impregnated and cooled and solidified in that state. it can.
Therefore, as the decorating material, not only the heat-melting material but also various materials such as cloth, non-woven fabric, glass cloth, asbestos and inorganic material can be selected.

Examples of the present invention will be shown below under specific manufacturing conditions. Example 1 of the present invention [Manufacturing conditions] Laminated thermoplastic resin ─── Polypropylene Reinforcing fiber ────── Glass fiber Volume content of fiber ─-60% Thickness ──────── 1 mm Heating temperature ─────── 1 minute at 250 ° C Foamed resin body ────── Polypropylene 15 times foaming When a laminated molded product was produced under the above conditions, a good molded product was obtained.

Example 2 of the present invention [Production conditions] Laminated thermoplastic resin ─── Polypropylene Reinforcing fiber ────── Glass fiber Volume content of fiber -60% Thickness ───── ──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────――

Example 3 of the present invention [Production conditions] Laminated thermoplastic resin ─── Polypropylene Reinforcing fiber ────── Glass fiber Volume content of fiber -60% Thickness ───── ──6mm Heating temperature ─────── 1 minute at 250 ℃ Decorative material ──────── P on polypropylene foam
The VC embossed sheet was used after being heated. When a laminated molded product was manufactured under the above conditions, a good molded product was obtained.

[0043]

Since the present invention is configured as described above, according to the present invention, the fiber-reinforced thermoplastic resin laminate and the foamed resin body are used by using mechanical coupling members such as bolts and nuts or adhesives. Without doing so, it is possible to provide a composite molded article and a method for producing the same, which are strongly bonded under a low pressure.

[Brief description of drawings]

FIG. 1 is an external perspective view of a laminated composite molded article according to the present invention obtained by a manufacturing method according to the present invention.

FIG. 2 is a side view showing a state in which a heated laminated body in which a thermoplastic resin is in a molten state is arranged around a foamed resin body in the manufacturing method according to the present invention.

FIG. 3 is a side view of a composite molded article obtained by closely shaping the laminated body of FIG. 2 on a foamed resin body and then cooling and solidifying the molded body to integrate the molded body.

FIG. 4 is a partial enlarged view of FIG. 3 and is a schematic diagram showing a state of a bonded portion where a laminated body and a foamed resin body are welded and solidified.

FIG. 5 is an external perspective view showing another two modes of the laminated composite molded article according to the present invention obtained by the manufacturing method according to the present invention.

FIG. 6 is a side view showing an embodiment in which, in the laminated molded article according to the present invention, both end regions of two laminated bodies joined around the foamed resin body are joined together.

FIG. 7 is a side view showing a state in which the laminate and the decorating material are arranged around the foamed resin body in the manufacturing method according to the present invention.

FIG. 8 is a side view of a composite molded product obtained by cooling and solidifying the foamed resin body, the laminated body, and the decorating material of FIG.

FIG. 9 is a side view showing an embodiment of a laminated molded product in which a laminated body and a decorating material are bonded to both surfaces of a foamed resin body according to the present invention.

FIG. 10 shows the state of the solidified and integrated portion of the decorative material fibers embedded in the molten resin of the laminate in the example using the decorative material with exposed fibers on the surface. It is an expansion schematic diagram showing.

[Explanation of symbols]

 1 Upper layered body in which thermoplastic resin is in a molten state 2 Lower layered body in which thermoplastic resin is in a molten state 3 Foamed resin body 4 Upper side decoration material 5 Lower side decoration material 6 Foamed resin body is melted to form a layered body Integrated layer 7 Fibers exposed on the surface of the decorative material a, b Bonding surface of laminates 1 and 2

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Satoshi Kishi 1190 Kasama-cho, Sakae-ku, Yokohama-shi, Kanagawa Mitsui Toatsu Chemical Co., Ltd. (72) Katsuyuki Morita 1190, Kasama-cho, Sakae-ku, Yokohama, Kanagawa Mitsui Toatsu Chemical (72) Inventor Nobuyuki Hosoyama 1190 Kasama-cho, Sakae-ku, Yokohama-shi, Kanagawa Mitsui Toatsu Chemical Co., Ltd. (72) Inventor Hiroshi Tanabe 1190, Kasama-cho, Sakae-ku, Yokohama, Kanagawa Mitsui Toatsu Chemical Co., Ltd. 72) Inventor Master Iida 2-1-1 Asahi-cho, Kariya City, Aichi Prefecture Aisin Seiki Co., Ltd. (72) Inventor Kiyotaka Nakai 2--1 Asahi-cho, Kariya City, Aichi Prefecture Aisin Seiki Co., Ltd.

Claims (12)

[Claims] Claims: 1. A laminated molded product obtained by joining a laminated body (1, 2) which is formed by laminating fiber-reinforced thermoplastic resin plates in layers to the surface of a foamed resin body (3) having a desired outer shape. In, the foamed resin body (3) and the laminated body (1, 2) are melted, mixed, and solidified at the joint portion with each other by the thermoplastic resin of the laminated body itself and the resin of the foamed resin body itself without using an adhesive. A laminated molded article characterized by being joined together by layers composed of. 2. The laminated molded product according to claim 1, wherein the fiber-reinforced thermoplastic resin plate contains reinforcing fibers in a volume content of 30% or more and 85% or less. 3. The laminated molded article according to claim 1, wherein the reinforcing fibers of the fiber-reinforced thermoplastic resin plate are glass fibers, the thermoplastic resin is a polypropylene resin, and the foam resin body is a polypropylene foam body. . 4. A laminated body (1, 2) formed by laminating fiber-reinforced thermoplastic resin plates containing reinforcing fibers having a volume content of 30% or more and 85% or less in layers, and heating the laminated body (1, 2). A step of degassing the air contained between the layers with the plastic resin in a molten state; and a laminated resin body (1, 2) in which the thermoplastic resin is in a molten state, having a desired outer shape 3) a step of superimposing and adhering on the surface of the laminated body, melting the surface of the foamed resin body with heat held by the laminated body, and welding the laminated body and the foamed resin body to each other; ) And a foamed resin body (3) are cooled and solidified to be integrated, and the steps are sequentially carried out. 5. The laminated molded article according to claim 4, wherein the reinforcing fibers of the fiber-reinforced thermoplastic resin plate are glass fibers, the thermoplastic resin is a polypropylene resin, and the foamed resin body is a polypropylene foam. Manufacturing method. 6. A laminated body (1, 2) formed by laminating fiber-reinforced thermoplastic resin plates in layers is joined to the surface of a foamed resin body (3) having a desired outer shape, and the laminated body is further formed. A laminated molded article obtained by bonding a decorative material (4) to the surface opposite to the surface bonded to the foamed resin body (3) (1), the foamed resin body (3) and the laminate. (1) is joined by a layer formed by melting, mixing, and solidifying the thermoplastic resin of the laminate itself and the resin of the foamed resin body themselves at the joint portion without using an adhesive. In the case where the decorative material is a thermoplastic resin product without the use of an adhesive, the thermoplastic resin of the laminate itself and the resin of the decorative material itself are bonded to each other. Are joined together by a layer formed by melting, mixing, and solidifying with each other. Or, in the case of an inorganic fiber product, the fibers of the decorating material are embedded in the molten thermoplastic resin of the laminate, or the molten thermoplastic resin of the laminate is impregnated between the fibers of the decorating material. A laminated molded article characterized by being joined together by a layer formed by solidifying a thermoplastic resin in the state of being. 7. The laminated molded product according to claim 6, wherein the fiber-reinforced thermoplastic resin plate contains reinforcing fibers in a volume content of 30% or more and 85% or less. 8. The laminated molded article according to claim 6, wherein the reinforcing fibers of the fiber-reinforced thermoplastic resin plate are glass fibers, the thermoplastic resin is a polypropylene resin, and the foamed resin body is a polypropylene foam. . 9. A laminated body (1, 2) formed by laminating fiber-reinforced thermoplastic resin plates containing reinforcing fibers in a volume content of 30% or more and 85% or less is heated, respectively, and the heat is applied. A step of degassing the air contained between the layers with the plastic resin in a molten state; and a laminated resin body (1, 2) in which the thermoplastic resin is in a molten state, having a desired outer shape The surface of the foamed resin body is melted by the heat held by the laminated body, and the laminated body and the foamed resin body are welded to each other at the same time as the laminated body (1, 2) A step of superposing and adhering the decorative material (4) on the surface opposite to the surface to be adhered to the foamed resin body (3), and adhering the laminated body and the decorative material to each other; Laminate (1, 2), foamed resin body (3) and Method for manufacturing a laminated molded article and executes cool decoration material (4), the steps allowed to integrally solidified, sequentially. 10. The decorating material (4) is a thermoplastic resin product, and the surface of the decorating material is melted by heat held by the laminate,
The method for producing a laminated molded article according to claim 9, wherein the laminate and the decorating material are joined to each other. 11. The decorative material (4) is an organic or inorganic fiber product, and the fibers of the decorative material are embedded in the molten thermoplastic resin of the laminate or laminated between the fibers of the decorative material. The method for producing a laminated molded article according to claim 9, wherein the laminate and the decorating material are bonded to each other in a state where the molten thermoplastic resin of the body is impregnated. 12. The method according to claim 9, wherein the reinforcing fibers of the fiber-reinforced thermoplastic resin plate are glass fibers, the thermoplastic resin is a polypropylene resin, and the foam resin body is a polypropylene foam body.